Improvement in chain-pump buckets



E. WHITE. Chain-Pump Bucket.

No. 205,819. Patented July'9, I878.

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ELBERT \(VHITE, OF STAMFORD, CONNECTICUT.

IMPROVEMENT IN CHAIN-PUMP BUCKETS.

Specification forming part of Letters Patent No. 205,819, dated July 9,1878; application filed January 22, 1878.

To all whom it may concern:

Be it known that I, ELBERT WHITE, of Stamford, in the county ofFairfield and State of Connecticut, have invented certain Improvementsin Buckets for Chain-Pumps, of which the following is a specification:

This invention relates to that class of buckets for chain-pumps whichare made of indiarubber; and its object is to provide a bucket of theclass specified which may be adjusted to a greater or less diameter, asoccasion may require, which may be made to compensate for any wear orloss of elasticity incurred from long use, and which will possess theform and characteristics best adapted to its most eflicient operationwhen applied to the pump.

Figure l is a side view of a bucket made according to my invention. Fig.2 is a central longitudinal sectional view of the same. Fig. 3 is asimilar view of the said bucket in modified form.

Having reference first to Figs. 1 and 2, A is a metallic shank, havingformed in one piece therewith at one end a loop, a, and a circular diskor shoulder, b, and at the other end a second loop, 0, the inner surfaceof which forms bearings a. On the central part or stem (1 of this shankA are one or more circumferential shoulders, c. It is, of course, to beunderstood that the links a 0 provide means whereby the bucket may beaffixed in place upon the chain.

B B indicate the two halves or sections of a hollow spheroidal orotherwise suitably shaped bulb, of india-rubber or any other appropriatematerial, and which constitutes the body of the bucket. The adjoiningedges e f of these two sections are rabbeted to fit upon each other, asshown in Fig. 2, and also in Fig. 3, the edge e of the section B-i. 0.,the section which is uppermost during the operation of thepump-projecting beyond the circumference, as represented in each of thefigures of the drawing. Each of these sections has a central hole oropening, which enables it to be slipped upon the shank A and broughtinto the position shown in the drawing.

When thus applied to the shank the ends of the bulb or body B B will becompressed between the disk or shoulder b and the bearings a, so thatthe central portion of said bulb or body is expanded in proportion tothe degree of compression exercised upon the bulb or body aforesaid.

The edge e, lapping beyond the edge f, as just explained, promotes orincreases the elasticity of the said body at the circumference, and addsto the facility with which such adjustment of the diameter of the bulbor body is secured.

In case the bulb or body should lose its elasticity, or for any otherreason require a higher degree of compression than is afforded betweenthe shoulder a and the bearings a, one or the other of the sections maybe pushed inward until it is caught and held by the adjacent shoulder c,which confines it with an expanded circumference proportioned to thedegree of its compression.

It is to be observed that the rabbets in the edges of the sectionsassist materially in keeping said edges in due relation with each other.

In Fig. 3 the shank A is of modified construction, the loop a beingprovided upon a nut, g, which is screwed upon one end of the shank, andthe bulb may be compressed by screwing said nut inward.

I am aware that buckets for chain-pumps have been proposed, in which asemispheroidal cup of larger diameter has been arranged with its thinnededges overlapping the edges of a smaller spheroidal cup in such mannerthat by compressing the two together the edges of the larger cup wouldbe expanded; but in this combination only the larger cup is expanded.The two cups do not mutually support each other at the edges, and thebucket has a much less firm and solid periphery when expanded than whenthe edges, being mutually rabbeted, mutually sustain each other, andboth expand together, such combination of a larger and smaller cup withthe thinned edges of the former merely lapping those of the latter. Itherefore do not claim this construction; but

\Vhat I claim as my invention is- 1. In a rubber bucket for chain-pumps,the bulb or body composed of sections 13 B, placed upon an eyedscrew-shank, A, and with the circumferentialedge of one section rabbetedupon the edge of the other, the whole held two sections rabbeted uponeach other, suband adjusted by means of a nut upon said stantially asand for the purpose set forth. screw-shank. substantially as described.4. The shank A, constructed with the loop 2. Hollow buckets or valves oftwo sections, a, shoulder 1), loop 0, and bearings 01, in com-OfSllllPl'Uitlillfl)llll,flll(ll'flblmfltlt0;IOlllQl,fl)llllbinationwith the two sections B B, substaning an adjustable bucket,substantially as dctially as herein set forth.

scribed. ELBERT 'IIITII.

3. In a bucket for ehaiirpunips, the bulb 0r \Vitnesses:

body composed of the sections B 13, placed ll. \VELLS, Jr.,

upon a shank, A, and with the edges of the HENRY EIFIILING.

